Valve and head construction



A. W. SCOTT VALVE AND HEAD CONSTRUCTION March 31, 1931.

Filed March 18'. 1929 Y/IIIIIIIII/IIIIIIIIIIIIIIII/II f/Isl!!! fl! l 1 III I N VEN TOR. Q NaH h. Ira?) n W T T A and arrangement of Patented Mar. 31, 1931 camera ESTATES .monn wrscor'non nnrnor'r, mrcmenn verve AND nmnconsrnccrron Application filed. March 18,1929. Serial No. 347580.

My invention relates to anew and useful improvement in a vaiveand head construc- *tion andhas for its objectithe *PI'OViSlOIl of such a structure as wiil permit the use of a iii-four cycle engine with a single ivalve oommun'icating "with the combustion chamber. Another ect 1 of the invention is to pro vi'de a valve construction in which "warping and overheating of "the valve will be .elimlnated or at least reduced to a minimum.

it is another objectio'fthe present invention to provide a construction in 'which :a thorough vaporization of the fuel may be efiected.

Another object of the invention is the provision in an engine, of a 'COIflbUSblOIl chamber which may be easily constructed and quickly machined.

Anothenobject of the-invention is thGtPI'O- vision of a structure in which valves of a 1125 valve -wii1=be rotated whileyin use so that a (proper sitting of the valve may rbe maintained at ail tiines.

Another-object of the invention C'LS the provision :of mechanism whereby communica- *tion with the combustion chamber and an intake or exhaust manifold, may alternately and quickly be established.

Other objects willappear hereinafter. The invention consists [i11 the combination parts hereinafter described and claimed.

The invention will he best understood by a reference to the accompanying drawings which form a partof-this Specification, and

in which,

Fig. 1 is a. sectional view of the invention. Fig.2 is a top plan view of an engine head embodying the invention.

Fig. Bis a sectional view taken on line 3%3 of;Eig..2.

Fig.4 is ,a sectional view taken .on line QfFig. 1. .Fig. .5 is a sectional view 1 ofFig. :1.

taken on line the upper end? of the stem Fig. 6 is :a View similanto Fig. showing a modified form of construction. 7 t

In the drawings 1 have illustratedithe invention used with an enginewhead 7 having the water chambers -8Itherein io1acooli11gpurposes and provided with asthreaded opening 9 "in which the spark plug may the mounted was to extend into the combustionichamber "10, which would be located over the cylinder p of the engine. Atport'flz'lserves to 'commun'icate the combustion chamber 110 with the recess or pocket 1 1 formed in aaro'tatable valve block 12. .A fia-nge 13 is formed onfthefhead of the block 12 and roller bearings 14 engaging :the race rings *1 5:and 1-6 serve .to support the head 12 in :positionand .reduceithe friction incident to rotation of the head 12. Formed in'the head 7 is aipair of passages it? and 18, one of which would communicate with "the intake imanifold. of the engine and .thexother withlthe exhaustmanifold. Projecting upwardly fromthe top of the head 7 are supporting standards 19, and-21. :Rockably mounted tbetween the standards 19 and 20 and pivoted thereon is a rocker arm .QQiengageabIe witha push rod 23 which is actuated in the customary manner o'f actuating apush rod'ondheiconventional type of internal combustion. engine, thatiis, hymen-11s --of the cam on the rcamshaft. A spring-2t' engages at one end the washer25 and the other end toithe washerQfiandservesnormaliy to. retain the valve *27 which carri-esythe 'vaivestem28 inclosed'position. This valve ismoved to open positionupon 1a rockingof the rockerarm 22, this rocker arm engaging 28. The valve '27 controls the communication ofthe recess 11 with the combustionengine and this recess 11 communicates with either of-the passages 17 or 18 and as to *Whichof the passages 17 or 18-the recess ll communicates with, may 'be determinedfw theoperation o'f'the engine, so that a" single-Waive :is used for controlling the intakeandfthe exhaust on a four cycle internal combustion engine.

R'ockably mountedibetween the supports 20 and 21 which are extended laterally at their upper :ends, is-an arm 29 carrying a cross head :30. iQne end :of-this across head is .en-

' Patent is gageable by the push rod 31 which is actuated 39 being considerably deeper than the notch 38. Projecting upwardly. from v the upper end of the head 12 are pins lO and 41. The pins 41 serve to support the washer 25 above,

so as to be free from contact with the arm 37. The'pin 40 is adapted to engage in the notch 39. r

In operation, when the push rod 31 is moved longitudinally so as to rock the cross head 30 against the compression of the spring 33, the arm 37 will be moved outwardly so as to efi'ecta rotation of the head 12 and thus bring the recess 11 into communication with the passage 17. When the arm 29 is rocked in the opposite direction in response to the pressure of the spring 33, the head 12 will also be rocked so as to bring the recess 11 into communication with the passage 18. Thus there is a means of alternately establishing communication between the combustion chamber and the'passages 17 and 18. The notch 38 serves to form clearance for the pins 41 so that no interference with the rotation of the head 12 may be effected.v

The form shown in Fig. 6 is as'illustrated for the preferred form excepting that the rod 37 is provided with teeth 44 so as to form a sort of rack bar meshing with the gear 45 which is fixedly mounted on the head 12. i

The invention may be used on engines now in operation by modifying the heads of the engine in the manner indicated. The lIlVBI1 tion may also be used on engines of the selfigniting type, the Diesel type and spark igniting type, either air or water cooled.

While I have illustrated and described the preferred form of my invention, I do not wish to limit myself to the precise details of structure shown but desire to avail myself of such variations and modifications as come within the scope of the appended claims. Having thus described my invention, what I claim as new and desire to secure by Letters 1. In a four cycle internal combustion engine having a combustion chamber; a head provided with a pair of separate passages; a valve controlling communication of each of said passages with said combustion chamber independently; rotatable means for selecting the passage to be communicated through said valve with said combustion chamber; a rock able member; and means cooperating with said rockable member for operating said rotatable selecting means; and rockable means for operating said control valve.

2. In an internal combustion engine having a combustion chamber; a head provided with a pair of separate passages; a valve for controlling communication of each of said passages with said combustion chamber independently rotatable means for selecting the passages to be communicated with said combustion chamber; means for opening said valve, 'said'valve being normally spring held in closed position; a rockable member; and means co-operatmg with said rockable member for rotating said selecting means alternately in opposite directions upon the rocking of said rockable member.

- '3. In an internal combustion engine having a combustion chamber: a head'having a pair of separate passages formed therein and adapted for communicating with said combustion chamber through a port; 'a valve for closing said port; a spring for normally retaining said valvev in closed position; means for moving said valve to open position against the tension of said spring a rotatable valve block having a recess formed in one for. establishing communication ofone of said passages with said port and upon rotation to another position for establishing side, adapted upon rotation to one position,

communication of the other of said passages with said port; reciprocating means formoving said rotatable valve block to either position; and rockable means for actuating said reciprocating means.

4. In an internal combustion enginehaving a combustion chamber: ahead having a pair of separate passages formed therein and adapted for communicating with said combustion chamber through a port; a valve for closing said port; a spring for normally retaining said valve in closed position; means for movingsaid valve to open position; a rotatable valve block adapted upon rotation to one position for establishing communication of one of said passages with said port and upon rotation to another position for establishing communication of the other of said passages to said port; reciprocating means for moving said rotatable valve block to either position a rocker; and means co-operating with said rocker for operating said reciprocating means.

5. In aninternal combustion engine having a combustion chamber: a head having a pair of separate passages formed therein and adapted for communicating with said combustion chamber through a port;-a valve for closingsaid port; a spring for normally retaining said valve in closed position; means for moving said valve to. open position; a rotatable valve block adapted uponrotation to one position for establishing communication of one of said passages with said port and upon rotation to another position for establishing communication of the other of said passages to said port; reciprocating means for moving said rotatable valve block to either position; a rocker; and means co-opcrating with said rocker for operating said reciprocating means; means for rocking said rocker in one direction; and resilient means for returning said rocker to normal position as rocking in said direction.

6. In an internal combusition engine having a combustion chamber: a head having a pair of separate passages formed therein and adapted for communicating with said combustion chamber through a port; a valve for closing said port; a spring for normally retaining said valve in closed position; means for moving said valve to open position; a rotatable valve block adapted upon rotation to one position for establishing communication of one of said passages with said port and upon rotation to another position for establishing communication of the other of said passages to said port: reciprocating means for moving said rotatable valve block to either position; a rocker; and means co-operating with said rocker for operating said reciprocating means, said reciprocating means riding on the upper surface of said head; and means positioned above said reciprocating means and cooperating with said head to provide a guide for said reciprocating means in its reciprocating movements.

In testimony whereof I have signed the foregoing specification.

ARNOLD W. SCOTT. 

